EP1964310A2 - Direct sequential network addressing (dsna) - Google Patents

Direct sequential network addressing (dsna)

Info

Publication number
EP1964310A2
EP1964310A2 EP06805589A EP06805589A EP1964310A2 EP 1964310 A2 EP1964310 A2 EP 1964310A2 EP 06805589 A EP06805589 A EP 06805589A EP 06805589 A EP06805589 A EP 06805589A EP 1964310 A2 EP1964310 A2 EP 1964310A2
Authority
EP
European Patent Office
Prior art keywords
detect
network
signal
blocking
transmission line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06805589A
Other languages
German (de)
French (fr)
Inventor
Christian Krause
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VIP 1 Aps
Original Assignee
VIP 1 Aps
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by VIP 1 Aps filed Critical VIP 1 Aps
Publication of EP1964310A2 publication Critical patent/EP1964310A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/02Details
    • H04L12/12Arrangements for remote connection or disconnection of substations or of equipment thereof
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements, protocols or services for addressing or naming
    • H04L61/50Address allocation
    • H04L61/5038Address allocation for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q2213/00Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1308Power supply
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q2213/00Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13097Numbering, addressing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q2213/00Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13166Fault prevention
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/50Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate

Definitions

  • US patent 6,700,877 describes a way of assigned a number of units with an unique address but in respect to the physical distance between the devices on a communication wire.
  • One known way of having both information and sequential addressing in one and same transition wire to achieve automatic sequential addressing could be done by opening the transmission line during addressing to recognize devices. In such a system is transmission line going trough each device via an open/close circuit which allows data to be cut of to secondary successive client devices. Sequentially addressing is then achieved with all network clients cutting off any transmission to secondary clients at the start of the addressing procedure. The network server can then only discover the first client on the transmission line. When first device has been discovered the first client stops cutting off transmission to its secondary client which then is discovered. The process is then repeated until all devices have been discovered.
  • the method of opening the transmission line has several drawbacks making it unfeasible to implement, these points are described below.
  • Network client can not be connected in a T fashion as shown in fig. 2a instead the transmission line needs to pass through the network client as shown in fig 2b.
  • the network client needs to be able to switch off secondary devices by using a switch such as a relay or semiconductor. In case switch fails will communication to all secondary devices be lost. 3. Using a relay as switch is undesirable as relays are mechanical and tends to fail over time and does not withstand static electric shocks well over time.
  • the object of the invention is to solve the problems described above.
  • a system comprising a network server coupled to and a number of networks clients connected to said networks server through a daisy chained network where said networks clients comprises a clamper circuit parallel coupled to said daisy network, said clamper comprises detection means adapted to detect a signal transmitted through said daisy network and clamping means adapted to short circuit said daisy network when said signal has been detected by detecting a signal on the transmission line via measuring voltage or current going trough the transmission line, and as a result of a detection block the signal 32 or by other means interrupt the signal, where the detect and blocking circuit 41 can be enabled and disabled 38 by the network client controller 33, characterized in that a detect and blocking instance is memorized by the detect and blocking circuit enabling the network client controller 33 to acquire 37 from detect and blocking circuit 41 if a detect and blocking instance has occurred.
  • said detect and blocking circuit will block signal 34 at first network client leaving a rest-signal 35 traveling down the transmission line, where rest-signal on a transmission line with an efficiency of X will result in the rest-signal decaying at a given rate given by X down the transmission line, resulting in network clients placed subsequently not detecting the decayed rest-signal 36 if spaced probably apart resulting in that said detect and blocking instance can be used to determine the physical order of a series network clients on a transmission line each having a detect and blocking circuit 41. and by network clients having a common predefined algorithm fig. 4 enabling and disabling the detect and blocking circuit 41 in such a way that all physical placement of network clients can be determined by network server.
  • figure 1 illustrates data network consisting of a server and multible number of clients.
  • figure 2a illustrates the client connected in parallel to a data network.
  • figure 2b illustrates the client connected in serial to a data network, with the ability do disconnected data subsequent clients.
  • figure 3 illustrates an embodiment of the present invention
  • figure 4 illustrates a flow diagram of generating sequential addressing.
  • figure 5 illustrates the ability to make a balance communication line unbalanced to reduce lifetime of rest pulse DESCRIPTION OF EMBODIMENTS
  • Sequential addressing Network using client device addresses or ID's in correlation with cable distance to the network server.
  • Network ID A network address or ID's representing a specific network client device.
  • the purpose of this invention is to create a solution to automatically generate network ID's in correlation with the cable distance to the network server without breaking or inserting any impedance or other device in series with the transmission line but to have network client connected in parallel with the passing transmission line as shown in fig. 1 where the first device is given ID 1 and the next 2,3,4 to N based on the clients distance to the Network server.
  • the DSNA method is show in fig 3 using a two wire transmission line such as twisted pair cable.
  • the DSNA unit 41 is shown implemented network client 30 consisting of a latch 31 and switch 32.
  • the switch 32 could be realized by using semiconductor or similar to get a desired short close time.
  • next successive network client 40 with the same DSNA circuit 41 implemented as in network client 30, is placed with far enough distance on the transmission line from the first network client 30 will the pulse 35 have decreased in amplitude to pulse 36 that is to low to trigger network client 40 DSNA circuit.
  • the DSNA circuit in any following network clients will therefore as well not trigger. We can therefore conclude that the first network client on the transmission line in distance to the network server must be the one where the DNSA circuit is triggered.
  • the client controller 33 reads back the result from the DSNA circuit 41 after a preset time via the result line 37 and then disables the DSNA circuit via the disable line 38 and transmits back to the network server the result, note that during transmission on the line all network clients must disable there DSNA circuits not to corrupt data transmitted between clients and server. A specific timing scheme must therefore be predetermined.
  • a flowchart of the discovery process can be seen in fig 4, note that disabling the latch 31 will as well perform a reset of the latch 31. The process is then repeated until all network clients have been discovered, and the order they are discovered equals the relative distance they are placed from the network server a successful sequential network addressing has been performed.
  • the minimum distance between network clients required to get a successful DSNA process without two network clients DSNA circuits triggering to the same signal is dependent on the bandwidth of the transmission line and the length of the remaining pulse 35.
  • To get shortest possible minimum length between devices requires that the remaining pulse 35 becomes as short as possible meaning that the DSNA circuit has to react as fast as possible.
  • the DSNA circuit should therefore be realized with as few components as possible to minimize propagation delay in the DSNA circuit.

Abstract

This invention relates to a system comprising a network server coupled to and a number of networks clients connected to said networks server through a daisy chained network where set networks clients comprises a clamper circuit parallel coupled to said daisy network, said clamper comprises detection means adapted to detect a signal transmitted through said daisy network and clamping means adapted to short circuit said daisy network when said signal has been detected. Characterized in that detect and blocking circuit (41) can detect a signal on the transmission line via measuring voltage or current going trough the transmission line, and as a result of a detection block the signal (32) or by other means interrupt the signal in that detect and blocking circuit (41) can be enabled and disabled (38) by the network client controller (33) in that a detect and blocking instance is memorized by detect and blocking circuit enabling the network client controller (33) to acquire (37) from detect and blocking circuit (41) if a detect and blocking instance has occurred.

Description

DIRECT SEQUENTIAL NETWORK ADDRESSING (DSNA)
FIELD OF THE INVENTION
The use of data networking is increasingly being implemented into all sorts of applications. When working with applications which uses daisy chained network configurations, each device on the network chain needs an individual network address to enable individual communication. A number of these applications require the network address or network ID, to be sequentially number in the order they are connected to the network. These types of applications could be a series of lighting devices, building management systems, sensor lines in fabrication facilities, traffic monitoring application etc. In any system where the device ID should correlate linearly with the distance on the network cable from the network server to the individual client devices.
Today this type of addressing could be performed by using a separate addressing wire as described in US patent 5,450,072 which requires an extra addressing wire in addition to the information wire. Using this type of sequential addressing does not allow the addressing and information wire to one and same wire as the required impedance (4) inserted in series addressing wire at each unit would compromise the impedance and therefore the integrity of the information being sent, and it is therefore needed to have to separate wires one for information and one for addressing and therefore increasing the cost of the wiring between the units, and are in some case impossibly to achieve as communication standards does not have spare wires specified for this purpose.
US patent 6,700,877 describes a way of assigned a number of units with an unique address but in respect to the physical distance between the devices on a communication wire. One known way of having both information and sequential addressing in one and same transition wire to achieve automatic sequential addressing, could be done by opening the transmission line during addressing to recognize devices. In such a system is transmission line going trough each device via an open/close circuit which allows data to be cut of to secondary successive client devices. Sequentially addressing is then achieved with all network clients cutting off any transmission to secondary clients at the start of the addressing procedure. The network server can then only discover the first client on the transmission line. When first device has been discovered the first client stops cutting off transmission to its secondary client which then is discovered. The process is then repeated until all devices have been discovered.
The method of opening the transmission line has several drawbacks making it unfeasible to implement, these points are described below.
1. Network client can not be connected in a T fashion as shown in fig. 2a instead the transmission line needs to pass through the network client as shown in fig 2b.
2. The network client needs to be able to switch off secondary devices by using a switch such as a relay or semiconductor. In case switch fails will communication to all secondary devices be lost. 3. Using a relay as switch is undesirable as relays are mechanical and tends to fail over time and does not withstand static electric shocks well over time.
4. Using a semiconductor as switch is also undesirable because they as well cannot withstand static electric shocks and when power is lost or turned off at one client, is transmission also cut of to secondary clients. Semiconductors never have completely constant and low impedance at different frequencies and can thereby change the impedance of the transmission line resulting in undesired reflection on transmission line. The "Direct Sequential Network Addressing" solves all of these issues and is described below. The "Direct Sequential Network Addressing" method will from now on be described as the "DSNA".
OBJECT AND SUMMARY OF THE INVENTION
The object of the invention is to solve the problems described above.
A system comprising a network server coupled to and a number of networks clients connected to said networks server through a daisy chained network where said networks clients comprises a clamper circuit parallel coupled to said daisy network, said clamper comprises detection means adapted to detect a signal transmitted through said daisy network and clamping means adapted to short circuit said daisy network when said signal has been detected by detecting a signal on the transmission line via measuring voltage or current going trough the transmission line, and as a result of a detection block the signal 32 or by other means interrupt the signal, where the detect and blocking circuit 41 can be enabled and disabled 38 by the network client controller 33, characterized in that a detect and blocking instance is memorized by the detect and blocking circuit enabling the network client controller 33 to acquire 37 from detect and blocking circuit 41 if a detect and blocking instance has occurred. In that said detect and blocking circuit will block signal 34 at first network client leaving a rest-signal 35 traveling down the transmission line, where rest-signal on a transmission line with an efficiency of X will result in the rest-signal decaying at a given rate given by X down the transmission line, resulting in network clients placed subsequently not detecting the decayed rest-signal 36 if spaced probably apart resulting in that said detect and blocking instance can be used to determine the physical order of a series network clients on a transmission line each having a detect and blocking circuit 41. and by network clients having a common predefined algorithm fig. 4 enabling and disabling the detect and blocking circuit 41 in such a way that all physical placement of network clients can be determined by network server.
The method of changing the efficiency of a balanced transmission line by disabling one line 51 in a balanced pair via disconnecting the line or by other means changing the balance between the two pairs decreasing the efficiency of the transmission line, this method of decreasing the efficiency of a transmission line to increase the rate at which a rest-signal decrease as it travels down a transmission line and thereby enabling shorter distance between network clients without a rest-signal will be detected by a network client.
BRIEF DESCRIPTION OF THE DRAWINGS In the following, preferred embodiments of the invention will be described referring to the figures, where
figure 1 illustrates data network consisting of a server and multible number of clients.
figure 2a illustrates the client connected in parallel to a data network.
figure 2b illustrates the client connected in serial to a data network, with the ability do disconnected data subsequent clients.
figure 3 illustrates an embodiment of the present invention
figure 4 illustrates a flow diagram of generating sequential addressing.
figure 5 illustrates the ability to make a balance communication line unbalanced to reduce lifetime of rest pulse DESCRIPTION OF EMBODIMENTS
In this document are shortened words used for simplifying the description, which are defined below.
Sequential addressing: Network using client device addresses or ID's in correlation with cable distance to the network server.
Network ID: A network address or ID's representing a specific network client device.
The purpose of this invention is to create a solution to automatically generate network ID's in correlation with the cable distance to the network server without breaking or inserting any impedance or other device in series with the transmission line but to have network client connected in parallel with the passing transmission line as shown in fig. 1 where the first device is given ID 1 and the next 2,3,4 to N based on the clients distance to the Network server.
The DSNA method is show in fig 3 using a two wire transmission line such as twisted pair cable.
The DSNA unit 41 is shown implemented network client 30 consisting of a latch 31 and switch 32. The switch 32 could be realized by using semiconductor or similar to get a desired short close time.
When a pulse 34 is transmitted by the network server will it when it reaches latch 31 trigger the latch that then will trigger the closure of switch 32. Switch will remain closed until the latch is reset from the client controller 33. The outcome of the latch 31 clamping the transmission line via switch 32, results in the pulse 34 being cut, resulting in a remaining much shorter pulse The length of the remaining pulse 35 is depended on the sum of propagation- delay of latch 31 and switch 32 and the length 42 between DSNA unit 41 and transmission line, which should be as short as possible. As all transmission lines in reality never can be 100% lossless, will the remaining pulse 35 decade as it travels down the transmission line. The rate of which the remaining pulse 35 decreases with the distance traveled on the transmission line depends on the bandwidth efficiency of the transmission line and the length of the remaining pulse 35. This can be proven because the width of the remaining pulse 35 approximately equal ΛA of 1st order wavelength characterizing the pulse 35, so the shorter the pulse is, the higher the transmissions line bandwidth need to be to carry it the same length.
If the next successive network client 40, with the same DSNA circuit 41 implemented as in network client 30, is placed with far enough distance on the transmission line from the first network client 30 will the pulse 35 have decreased in amplitude to pulse 36 that is to low to trigger network client 40 DSNA circuit.
The DSNA circuit in any following network clients will therefore as well not trigger. We can therefore conclude that the first network client on the transmission line in distance to the network server must be the one where the DNSA circuit is triggered.
The client controller 33 reads back the result from the DSNA circuit 41 after a preset time via the result line 37 and then disables the DSNA circuit via the disable line 38 and transmits back to the network server the result, note that during transmission on the line all network clients must disable there DSNA circuits not to corrupt data transmitted between clients and server. A specific timing scheme must therefore be predetermined. A flowchart of the discovery process can be seen in fig 4, note that disabling the latch 31 will as well perform a reset of the latch 31. The process is then repeated until all network clients have been discovered, and the order they are discovered equals the relative distance they are placed from the network server a successful sequential network addressing has been performed.
As explained previously is the minimum distance between network clients required to get a successful DSNA process without two network clients DSNA circuits triggering to the same signal, is dependent on the bandwidth of the transmission line and the length of the remaining pulse 35. To get shortest possible minimum length between devices requires that the remaining pulse 35 becomes as short as possible meaning that the DSNA circuit has to react as fast as possible. The DSNA circuit should therefore be realized with as few components as possible to minimize propagation delay in the DSNA circuit.
It is desired to have as short as possible minimum length between client devices to enable the possibility to have as short as possible transmission line between client devices if desired. It is therefore essential that the remaining pulse becomes as short as possible to achieve the shortest possible minimum distance between network clients for a successful DSNA process to occur.
Lowering the bandwidth of the transmission line during DSNA addressing might seem like an impossible task, but it is actually achievable on certain transmission lines. An example is a transmission line realized by using shielded twisted pair, the main part of the bandwidth efficiency of such a cable is dependent on the balance between the two wires in the twisted pair. Putting the pair out of balance will greatly reduce the bandwidth of the cable. This can be done by disabling one of the wires in the pair by disconnecting it or in this example connecting it to the shield as shown in fig 5. The server controller 50 can then clamp one of the wires in the twisted pair during DSNA via switch 51 and thereby achieve a lower bandwidth of the transmission line during DSNA operation. As shown in the network client is the DSNA unit 52 only using the active wire 53 in the twisted pair and the shield as reference. This can also be achieved in non shielded cables by using a third wire as ground.

Claims

1. A system comprising a network server coupled to and a number of networks clients connected to said networks server through a daisy chained network where said networks clients comprises a clamper circuit parallel coupled to said daisy network, said clamper comprises detection means adapted to detect a signal transmitted through said daisy network and clamping means adapted to short circuit said daisy network when said signal has been detected.
2. Circuit arrangement according to claim 1 , Characterized in that detect and blocking circuit 41 can detect a signal on the transmission line via measuring voltage or current or both going trough the transmission line, and as a result of a detection block the signal 32 or by other means interrupt the signal.
3. Circuit arrangement according to claim 1 and functionality of detect and blocking circuit as in claim 2, Characterized in that detect and blocking circuit 41 can be enabled and disabled 38 by the network client controller 33.
4. Circuit arrangement according to claim 1 and functionality of detect and blocking circuit as in claim 2 and 3, Characterized in that a detect and blocking instance is memorized by detect and blocking circuit enabling the network client controller 33 to acquire 37 from detect and blocking circuit 41 if a detect and blocking instance has occurred.
5. Circuit arrangement according to claim 1 and functionality of detect and blocking circuit as in claim 2, Characterized in that said detect and blocking circuit will block signal 34 at first network client leaving a rest-signal 35 traveling down the transmission line, where rest-signal on a transmission line with an efficiency of X will result in the rest-signal decaying at a given rate given by X down the transmission line, resulting in following network clients not detecting the decayed rest-signal 36 if spaced probably apart.
6. Circuit arrangement according to claim 1 and functionality of detect and blocking circuit and instance as in claim 4 and 5, Characterized in that said detect and blocking instance can be used to determine the physical order of a series network clients on a transmission line each having an detect and blocking circuit 41.
7. Circuit arrangement according to claim 1 and functionality of detect and blocking instance as in claim 4 and 6, Characterized in that network clients having a common predefined algorithm fig. 4 enabling and disabling the detect and blocking circuit 41 in such a way that all physical placement of network clients can be determined by network server.
8. The method of changing the efficiency of a balanced transmission line by disabling one line 51 in a balanced pair via disconnecting the line or by other means changing the balance between the two pairs decreasing the efficiency of the transmission line.
9. Method as described in claim 8 and detect and blocking functionality as described in claim 5, Using the method of decreasing the efficiency of a transmission line to increase the rate at which a rest-signal decrease as it travels down a transmission line and thereby enabling shorter distance between network clients without a rest-signal will be detected by a network client.
10. A networks client adapted to be connected to a networks server through a daisy chained network where said networks client comprises a clamper circuit parallel coupled to said daisy network, said clamper comprises detection means adapted to detect a signal transmitted through said daisy network and clamping means adapted to short circuit said daisy network when said signal has been detected.
11. Circuit arrangement according to claim 10, Characterized in that a detect and blocking circuit 41 can detect a signal on the transmission line via measuring voltage or current or both going trough a transmission line, and as a result of a detection block the signal 32 or by other means interrupt a signal.
12. Circuit arrangement according to claim 10 and functionality of detect and blocking circuit as in claim 11 , Characterized in that detect and blocking circuit 41 can be enabled and disabled 38 by the network client controller 33.
13. Circuit arrangement according to claim 10 and functionality of detect and blocking circuit as in claim 11 and 12, Characterized in that a detect and blocking instance is memorized by a detect and blocking circuit enabling the network client controller 33 to acquire 37 from detect and blocking circuit 41 if a detect and blocking instance has occurred.
14. Circuit arrangement according to claim 10 a functionality of detect and blocking circuit as in claim 11 , Characterized in that a detect and blocking circuit will block signal 34 at first network client leaving a rest-signal 35 traveling down a transmission line, where rest-signal on a transmission line with an efficiency of X will result in a rest-signal decaying at a given rate given by X down the transmission line, resulting in following network clients not detecting the decayed rest-signal 36 if spaced probably apart.
15. Circuit arrangement according to claim 10 a functionality of detect and blocking circuit and instance as in claim 13 and 14, Characterized in that a detect and blocking instance can be used to determine a physical order of a series network clients on a transmission line each having a detect and blocking circuit 41.
16. Circuit arrangement according to claim 10 and functionality of a detect and blocking instance as in claim 13 and 15, Characterized in that network clients having a common predefined algorithm fig. 4 enabling and disabling a detect and blocking circuit 41 in such a way that all physical placement of network clients can be determined by network server.
17. The method of changing the efficiency of a balanced transmission line by disabling one line 51 in a balanced pair via disconnecting the line or by other means changing the balance between two pairs decreasing the efficiency of the transmission line.
18. Method as described in claim 17 and a detect and blocking functionality as described in claim 14, Using the method of decreasing the efficiency of a transmission line to increase the rate at which a rest-signal decrease as it travels down a transmission line and thereby enabling shorter distance between network clients without a rest-signal will be detected by a network client.
EP06805589A 2005-11-24 2006-11-22 Direct sequential network addressing (dsna) Withdrawn EP1964310A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200501648 2005-11-24
PCT/DK2006/000651 WO2007059772A2 (en) 2005-11-24 2006-11-22 Direct sequential network addressing (dsna)

Publications (1)

Publication Number Publication Date
EP1964310A2 true EP1964310A2 (en) 2008-09-03

Family

ID=37903996

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06805589A Withdrawn EP1964310A2 (en) 2005-11-24 2006-11-22 Direct sequential network addressing (dsna)

Country Status (3)

Country Link
US (1) US20080291844A1 (en)
EP (1) EP1964310A2 (en)
WO (1) WO2007059772A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7142107B2 (en) 2004-05-27 2006-11-28 Lawrence Kates Wireless sensor unit
EP1905200A1 (en) 2005-07-01 2008-04-02 Terahop Networks, Inc. Nondeterministic and deterministic network routing
US20090129306A1 (en) * 2007-02-21 2009-05-21 Terahop Networks, Inc. Wake-up broadcast including network information in common designation ad hoc wireless networking
WO2009151877A2 (en) 2008-05-16 2009-12-17 Terahop Networks, Inc. Systems and apparatus for securing a container
US8391435B2 (en) 2008-12-25 2013-03-05 Google Inc. Receiver state estimation in a duty cycled radio
DE102009027020A1 (en) 2009-06-18 2010-12-23 Robert Bosch Gmbh Connecting element for connecting a data supply unit to a connection string

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4745597A (en) * 1986-05-14 1988-05-17 Doug Morgan Reconfigurable local area network
US5450072A (en) * 1990-05-10 1995-09-12 Vockenhuber; Peter Addressing device
US5136579A (en) 1990-10-01 1992-08-04 Rockwell International Corporation Digital communications network with unlimited channel expandability
DE19733906C2 (en) 1997-08-05 1999-09-30 Siemens Ag Method for automatic address assignment, bus system for automatic address assignment and communication participants that can be used in the bus system or in the context of the method
US6134623A (en) * 1998-08-21 2000-10-17 International Business Machines Corporation Method and system for taking advantage of a pre-stage of data between a host processor and a memory system
JP4413293B2 (en) * 1998-09-24 2010-02-10 富士通マイクロエレクトロニクス株式会社 Memory device with faster reset operation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007059772A2 *

Also Published As

Publication number Publication date
WO2007059772A3 (en) 2007-07-05
WO2007059772A2 (en) 2007-05-31
US20080291844A1 (en) 2008-11-27

Similar Documents

Publication Publication Date Title
EP1872452B1 (en) Power distribution system using solid state power controllers
US20080291844A1 (en) Direct Sequential Network Addressing (Dsna)
EP1402684B1 (en) Network documentation system with electronic modules
JP6822977B2 (en) Improvement of DC or DC protection method
US20130242747A1 (en) Communication cable breaker and method using same
US20120154971A1 (en) Programmable Lightning Detector
WO2003065651A2 (en) Systems and methods for documenting networks with electronic modules in ports and devices
CN103733457A (en) Adaptive light detection for arc mitigation systems
RU2011128354A (en) METHOD AND DEVICE FOR PROTECTION FOR MONITORING OF POWER TIRES OF ELECTRIC POWER SUPPLY NETWORK
CN100401609C (en) Improved power-line protection
CN102594589A (en) Ethernet fault injection method, device and system
JPH0799504A (en) Token-ring local-area-network testing apparatus inserted and attached at active t-shaped apparatus constitution
US5497284A (en) Method and device for the protection of a series bus against short circuits
US7256684B1 (en) Method and apparatus for remote powering of device connected to network
US4224684A (en) Receive/bypass circuit for subsystems in polling system
CN104283538A (en) Phase Gating Controller and Method for Phase Gating Control
WO2004008600A3 (en) Electrical network protection system
CN113608145B (en) Multi-path photovoltaic module ground fault detection device and detection method
JP4317590B2 (en) Circuit arrangement and method for uninterruptible generator testing
CN1886934B (en) 10/100 MBS network device
US6333625B1 (en) Fault localizing and identifying device for electric systems
CN108462143B (en) A kind of test optical port recognition methods of intelligent substation and device
CN110261752A (en) Semiconductor devices fault detection method and device, converter
CN113009246A (en) PSE equipment detection device and PSE equipment detection method
JPH01221028A (en) Power line carrier system transmission system

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20080624

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20110601